diff --git a/Linux_kernel_diagram.dot b/Linux_kernel_diagram.dot
index df64dc4..4402ae3 100644
--- a/Linux_kernel_diagram.dot
+++ b/Linux_kernel_diagram.dot
@@ -1,6 +1,5 @@
 digraph "Linux_kernel_diagram" {
 	graph [
-
 		newrank = true,
 		nodesep = 0.3,
 		ranksep = 0.2,
@@ -17,7 +16,6 @@ digraph "Linux_kernel_diagram" {
 		width = 2.2
 	]
 	edge [
-
 		arrowhead = none,
 		arrowsize = 0.5,
 		labelfontname = "Ubuntu",
@@ -43,8 +41,8 @@ digraph "Linux_kernel_diagram" {
 			width = 2]
 		system -> system_ [
 			arrowhead = "",
-			row = func]
-				SCI [
+			row = func];
+		SCI [
 			URL = "https://en.wikibooks.org/wiki/The_Linux_Kernel/Syscalls",
 			fillcolor = "#d9e7ee",
 			fixedsize = true,
@@ -82,8 +80,8 @@ digraph "Linux_kernel_diagram" {
 		bus_drv -> buses
 	}
 	subgraph networking {
-		node [ color = "#61c2c5"]
-		edge [ color = "#61c2c5"]
+		node [color = "#61c2c5"]
+		edge [color = "#61c2c5"]
 		networking_ [
 			fixedsize = true,
 			height = 0,
@@ -135,11 +133,11 @@ digraph "Linux_kernel_diagram" {
 			label = NFS,
 			shape = octagon,
 			width = 1.2]
-		NFS -> log_prot [ weight = 0]
+		NFS -> log_prot [weight = 0]
 	}
 	subgraph processing {
-		node [ color = "#c46747"]
-		edge [ color = "#c46747"]
+		node [color = "#c46747"]
+		edge [color = "#c46747"]
 		processing_ [
 			fixedsize = true,
 			height = 0,
@@ -194,9 +192,9 @@ digraph "Linux_kernel_diagram" {
 	subgraph mem {
 		node [
 			color = "#51bf5b",
-			height = 0.5
+			height = 1
 		]
-		edge [ color = "#51bf5b"]
+		edge [color = "#51bf5b"]
 		MA [
 			color = "#51bf5b",
 			fillcolor = "#d9e7ee",
@@ -216,7 +214,6 @@ digraph "Linux_kernel_diagram" {
 			width = 2]
 		mmap -> log_mem
 		log_mem -> PA
-		//VFS -> SW [ style = invis]
 		SW [
 			color = "#8383cc",
 			fillcolor = "#91b5c9",
@@ -225,7 +222,7 @@ digraph "Linux_kernel_diagram" {
 			height = 0.8,
 			shape = octagon,
 			width = 1.2]
-		mmap -> SW [ weight = 1]
+		mmap -> SW [weight = 1]
 		SW -> block [
 			color = "#8383cc", weight = 1]
 		PA [
@@ -248,8 +245,8 @@ digraph "Linux_kernel_diagram" {
 		VM -> mmap
 	}	// mem
 	subgraph storage {
-		node [ color = "#8383cc"]
-		edge [ color = "#8383cc"]
+		node [color = "#8383cc"]
+		edge [color = "#8383cc"]
 		NFS;
 		storage_ [
 			shape = point,
@@ -277,9 +274,8 @@ digraph "Linux_kernel_diagram" {
 			fillcolor = "#b2d3e4",
 			label = "Virtual\nFile System"]
 		FS -> VFS
-		VFS -> mmap [ weight = 0]
-		VFS -> NFS [
-			weight = 0]
+		VFS -> mmap [weight = 0]
+		VFS -> NFS [weight = 0]
 		logFS [
 			fillcolor = "#6a9ab1",
 			fontsize = 20,
@@ -293,7 +289,7 @@ digraph "Linux_kernel_diagram" {
 			label = "page\ncache",
 			shape = octagon,
 			width = 1.2]
-		VFS -> PC [ weight = 0]
+		VFS -> PC [weight = 0]
 		block [
 			fillcolor = "#71809b",
 			fontsize = 20,
@@ -360,16 +356,15 @@ digraph "Linux_kernel_diagram" {
 		HID -> display
 	} // HI
 	subgraph functions {
-		graph [
-			rank = same]
+		graph [rank = same]
 		edge [
 			style = invis,
 			weight = 1
 		]
 		system;
 		networking;
-		system -> processing [ weight = 1]
-		storage -> networking [ weight = 1]
+		system -> processing [weight = 1]
+		storage -> networking [weight = 1]
 		memory [
 			color = "#51bf5b",
 			URL = "https://en.wikibooks.org/wiki/The_Linux_Kernel/Memory",
@@ -378,16 +373,15 @@ digraph "Linux_kernel_diagram" {
 			height = 0.6,
 			row = func,
 			width = 2]
-		memory -> storage [ weight = 1]
-		processing -> memory [
-			weight = 1]
+		memory -> storage [weight = 1]
+		processing -> memory [weight = 1]
 		functions_ [
 			fixedsize = true,
 			height = 0,
 			shape = point
 			style = invis,
 			width = 0]
-		functions_ -> HI -> system [ weight = 1]
+		functions_ -> HI -> system [weight = 1]
 		functions [
 			color = gray,
 			tooltip = "Columns represent main functionalities of the kernel",
@@ -405,7 +399,7 @@ digraph "Linux_kernel_diagram" {
 			weight = ""]
 	}
 	subgraph interfaces {
-		graph [ rank = same]
+		graph [rank = same]
 		SCI;
 		sock;
 		FS;
@@ -427,7 +421,7 @@ digraph "Linux_kernel_diagram" {
 		MA;
 	}
 	{
-		edge [ style = invis weight = 10 ]
+		edge [style = invis weight = 10 ]
 		system_;
 		SCI;
 		system_ -> SCI;
@@ -453,8 +447,7 @@ digraph "Linux_kernel_diagram" {
 		memory_ -> MA;
 	}
 	subgraph virtual {
-		graph [
-			rank = same]
+		graph [rank = same]
 		sysfs;
 		prot_fam;
 		VFS;
@@ -478,8 +471,7 @@ digraph "Linux_kernel_diagram" {
 			label = "Virtual\nmemory"]
 	}
 	subgraph bridges {
-		graph [
-			rank = same]
+		graph [rank = same]
 		bridges [
 			fillcolor = "#91b5c9",
 			shape = octagon,
@@ -499,8 +491,7 @@ digraph "Linux_kernel_diagram" {
 		//PC
 	}
 	subgraph logical {
-		graph [
-			rank = same]
+		graph [rank = same]
 		log_sys;
 		log_prot;
 		logFS;
@@ -522,7 +513,7 @@ digraph "Linux_kernel_diagram" {
 		//SW
 	}
 	subgraph HWI {
-		graph [ rank = same]
+		graph [rank = same]
 		HWI [
 			fillcolor = "#71809b",
 			label = "hardware\ninterfaces",
@@ -541,8 +532,7 @@ digraph "Linux_kernel_diagram" {
 			width = 0]
 	}
 	subgraph HW {
-		graph [
-			rank = same]
+		graph [rank = same]
 		HW [
 			fillcolor = "#777777",
 			fontcolor = white,
@@ -566,16 +556,14 @@ digraph "Linux_kernel_diagram" {
 		label = "© 2007-2021 Constantine Shulyupin http://www.MakeLinux.net/kernel/diagram",
 		shape = plaintext,
 		style = ""]
-	CPU -> bottom [
-		style = invis]
+	CPU -> bottom [style = invis]
 	layers [
 		fillcolor = lightgray,
 		tooltip = "Functionalities are divided to common layers. It is approximate division.",
 		height = 0.1,
 		style = "filled,setlinewidth(0)",
 		width = 0.5]
-	functions -> layers [
-		style = invis ]
+	functions -> layers [style = invis ]
 	usr -> usr_ [
 		arrowhead = "",
 		color = "#d9e7eeff",
@@ -635,5 +623,5 @@ digraph "Linux_kernel_diagram" {
 		label = "Linux kernel diagram",
 		shape = plain,
 		style = ""]
-	LKD -> processing [ style = invis]
+	LKD -> processing [style = invis]
 }